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September Weather in San Ygnacio, United States

Last updated: June 24, 2025

In September, the average temperature in San Ygnacio, United States typically hovers around 29°C (85°F). Here, you can expect a minimum of 17°C (63°F) and a maximum that can reach up to 41°C (106°F). With an average humidity of 73% and about 99 mm (3.9 in) of precipitation spread over 9 days, the climate can be quite dynamic, making it essential to prepare for varied weather conditions.

September Temperature in San Ygnacio

In September in San Ygnacio, the average temperature is 29°C (85°F), with maximums reaching 41°C (106°F) and minimums dropping as low as 17°C (63°F). Be prepared for diverse weather conditions if you're planning to travel during this month.

September Weather in San Ygnacio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Ygnacio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Ygnacio, September typically has an average temperature of 29°C (85°F), with highs reaching up to 41°C (106°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec606473788488899085776863
Data source: Temperature data for San Ygnacio generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in San Ygnacio

In San Ygnacio in September, the precipitation amount is 99 mm (3.9 in) during a span of 9 days.

September Precipitation Trends in San Ygnacio

The chart displays monthly precipitation patterns in San Ygnacio, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In San Ygnacio, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec161531446947601999382519
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Ygnacio

In San Ygnacio in September, humidity is 73%. With an average temperature of 29°C (85°F), this humidity feels like a warm blanket enveloping you, making outdoor activities quite uncomfortable and sticky for traveling.

September Average Humidity in San Ygnacio

This chart illustrates the average monthly humidity levels in San Ygnacio, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in San Ygnacio is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%79%76%77%80%73%66%65%73%76%80%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Ygnacio

In San Ygnacio in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Ygnacio.

Maximum UV Index Levels in San Ygnacio for September

The chart shows the monthly maximum UV Index (UVI) for San Ygnacio in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in San Ygnacio typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810111212121211975
Data source: San Ygnacio September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in San Ygnacio Compares to Other Months

Weather in San Ygnacio varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Ygnacio, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Ygnacio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (60°F)15 mm (0.6 inches)83%high
February Weather18°C (65°F)15 mm (0.6 inches)79%very high
March Weather23°C (73°F)31 mm (1.2 inches)76%very high
April Weather26°C (78°F)44 mm (1.7 inches)77%extreme
May Weather29°C (84°F)69 mm (2.7 inches)80%extreme
June Weather31°C (88°F)47 mm (1.8 inches)73%extreme
July Weather32°C (89°F)60 mm (2.4 inches)66%extreme
August Weather32°C (90°F)18 mm (0.7 inches)65%extreme
September Weather29°C (85°F)99 mm (3.9 inches)73%extreme
October Weather25°C (78°F)38 mm (1.5 inches)76%very high
November Weather20°C (68°F)25 mm (1.0 inches)80%high
December Weather17°C (63°F)19 mm (0.8 inches)86%moderate

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